Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/textord/equationdetectbase.cpp @ 46:7ee69f120f19 default tip

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>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: equationdetectbase.cpp
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3 // Description: The base class equation detection class.
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4 // Author: Zongyi (Joe) Liu (joeliu@google.com)
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5 // Created: Fri Aug 31 11:13:01 PST 2011
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6 //
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7 // (C) Copyright 2011, Google Inc.
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8 // Licensed under the Apache License, Version 2.0 (the "License");
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9 // you may not use this file except in compliance with the License.
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10 // You may obtain a copy of the License at
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11 // http://www.apache.org/licenses/LICENSE-2.0
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12 // Unless required by applicable law or agreed to in writing, software
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13 // distributed under the License is distributed on an "AS IS" BASIS,
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14 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 // See the License for the specific language governing permissions and
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16 // limitations under the License.
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17 //
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18 ///////////////////////////////////////////////////////////////////////
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20 #ifdef HAVE_CONFIG_H
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21 # include "config_auto.h"
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22 #endif
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24 #include "equationdetectbase.h"
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26 #include "blobbox.h"
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28 #include <allheaders.h>
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30 namespace tesseract {
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32 // Destructor.
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33 // It is defined here, so the compiler can create a single vtable
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34 // instead of weak vtables in every compilation unit.
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35 EquationDetectBase::~EquationDetectBase() = default;
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37 void EquationDetectBase::RenderSpecialText(Image pix, BLOBNBOX *blob) {
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38 ASSERT_HOST(pix != nullptr && pixGetDepth(pix) == 32 && blob != nullptr);
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39 const TBOX &tbox = blob->bounding_box();
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40 int height = pixGetHeight(pix);
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41 const int box_width = 5;
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43 // Coordinate translation: tesseract use left bottom as the original, while
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44 // leptonica uses left top as the original.
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45 Box *box = boxCreate(tbox.left(), height - tbox.top(), tbox.width(), tbox.height());
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46 switch (blob->special_text_type()) {
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47 case BSTT_MATH: // Red box.
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48 pixRenderBoxArb(pix, box, box_width, 255, 0, 0);
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49 break;
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50 case BSTT_DIGIT: // cyan box.
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51 pixRenderBoxArb(pix, box, box_width, 0, 255, 255);
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52 break;
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53 case BSTT_ITALIC: // Green box.
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54 pixRenderBoxArb(pix, box, box_width, 0, 255, 0);
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55 break;
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56 case BSTT_UNCLEAR: // blue box.
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57 pixRenderBoxArb(pix, box, box_width, 0, 255, 0);
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58 break;
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59 case BSTT_NONE:
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60 default:
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61 // yellow box.
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62 pixRenderBoxArb(pix, box, box_width, 255, 255, 0);
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63 break;
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64 }
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65 boxDestroy(&box);
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66 }
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68 } // namespace tesseract